The issue is known, requires complete redesign of traffic light code. I already started working on it, but it will take a while, more likely few months, if any alpha would be shown then probably not before CS2 (if it really be released somewhere this year) and I'm not 100% sure if I won't scrap the idea completely.
It's like writing the game in the game, but not just adding new things but mostly fighting with simulation data that is available and many performance issues. Simulation part is not super hard but figuring out how to make UI that will setup things, keep itself in sync etc. plus be more or less intuitive and understandable to the point that won't require reading multipage documentation is really a challenge.

Thanks for the info. I sort of figured there was a coding issue that made doing that harder and that's why it hasn't been done yet.

I'm just more glad I was able to explain it well enough on the first go.